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Finding the Fourth Proportional to 6,991.79, 10,476.72 and 3,869.87

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Solution

The fourth proportional to 6,991.79, 10,476.72 and 3,869.87 is: 5,798.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.79 : 10,476.72 = 3,869.87 : x
  2. Step 2: Convert to fraction form
    6,991.79/10,476.72 = 3,869.87/x
  3. Step 3: Cross multiply
    6,991.79x = 10,476.72 × 3,869.87
  4. Step 4: Simplify right side
    6,991.79x = 40,543,492.04
  5. Step 5: Solve for x
    x = 40,543,492.04/6,991.79
  6. Step 6: Final answer
    x = 5,798.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.